基于树根桩加固的震后公路路基边坡综合修复技术

为实现震后路基边坡的快速修复,提出基于树根桩加固的震后公路路基边坡综合修复技术。根据路基震害及地质环境对路基边坡的影响分析因素,采用树根桩技术及气泡轻质填土技术修复路基边坡;利用三维有限差分法模拟树桩加固气泡轻质填土修复后路基边坡得到参数值,再结合强度折减法计算得到的路基边坡稳定系数,最后得到优化树根桩的设计参数,以实现震后路基边坡综合修复。以上方法通过仿真模拟实验,得到最优的树根桩排距为2.5 dm。

Technology Based on Root-Pile Strengthening for the ComprehensivePost-earthquake Restoration of Highway Subgrade Slopes

A comprehensive technology for accelerating the post-earthquake restoration of subgrade road slopes is proposed. The technology is based on root-pile reinforcement and foamed lightweight soil technology, and restoration is performed in accordance with subgrade earthquake damage and the influence analysis results of the geological environment of the subgrade slope. The three-dimensional finite-difference method is used to simulate the restored subgrade slope and to obtain parameters. Then, the design parameters of the optimized root piles are acquired by combining the stability coefficients of the subgrade slope calculated through the strength reduction method. Finally, the post-earthquake subgrade is comprehensively restored. Simulation experiments reveal that the optimal root-pile spacing is 25 cm.